<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Test Grid</title>
    <style>
        .container{
            background-color: yellow;
            display: grid;
            grid-template-columns: 150px 450px 150px;

        }
        .item{
            border: 1px solid red;
            line-height: 150px;
            text-align: center;
            /*background-color: cyan;*/
        }
    </style>
</head>
<body>
<div class="container">
    <div class="item">1</div>
    <div class="item">2</div>
    <div class="item">3</div>
    <div class="item">4</div>
    <div class="item">5</div>
    <div class="item">6</div>
    <div class="item">7</div>
    <div class="item">8</div>
    <div class="item">9</div>
</div>
</body>
</html>
